[WebView Support Library] Pass and fetch list of supported features.

We need some way for either side (android support library + chromium) of
the webview support library to tell what features the other side of the
support library supports. We do this by passing a list of integers
across the boundary. These integers will each represent a feature (which
will be defined in a class in the boundary interface package).

Add a single feature to the list of features to support (visual state
callback).

Bug: 740082
Change-Id: I791af590cb846d536d01d63649ab6cfffe558ee9
Reviewed-on: https://chromium-review.googlesource.com/941805
Commit-Queue: Gustav Sennton <gsennton@chromium.org>
Reviewed-by: Nate Fischer <ntfschr@chromium.org>
Reviewed-by: Bo <boliu@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#542169}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: ba016de1efcd69651c043f5958e9c4530c7d36a2
4 files changed
tree: 2ddb305b67b3a4dbeb0790a6fb5b19ad6df030c6
  1. BUILD.gn
  2. DEPS
  3. proguard.flags
  4. src/